Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1281      519       16.583452  17.799194  17.056754  0.221097   17.052742 
2008            1281      519       16.275677  17.987806  16.998555  0.360339   16.987484 
2009            1281      519       16.778032  17.925484  17.226753  0.229473   17.184225 
2010            1281      519       15.132677  15.98429   15.614702  0.200311   15.629258 
2011            1281      519       14.457065  15.63      15.03379   0.253075   15.041388 
2012            1281      519       16.996065  17.934162  17.340509  0.181656   17.320322 
2013            1281      519       17.848227  18.954193  18.316526  0.234964   18.297291 
2014            1281      519       14.277355  15.81071   15.015495  0.332959   15.021291 
2015            1281      519       16.099613  17.681839  16.886831  0.373211   16.887386 
2016            1281      519       14.223935  16.090258  15.018502  0.387494   15.011258 
2017            1281      519       17.386097  19.150774  18.119061  0.424157   18.060289 
2018            1281      519       14.354677  16.656904  15.367956  0.486683   15.36071  
2019            1281      519       15.315613  16.852161  15.893938  0.298505   15.879065 
2020            1281      519       15.655935  16.967001  16.219565  0.293758   16.203678 
2021            1281      519       14.685549  16.591677  15.450088  0.414879   15.414387 
2022            1281      519       15.534323  18.216549  16.577443  0.573133   16.514645 
2023            1281      519       16.08342   18.089838  16.862181  0.420808   16.817516